Undelivered Mail Returned to Sender

Undelivered Mail Returned to Sender

Hi, 

When I tried to send the email to my client, I kept getting the following error email. I have checked with my client on their email address, and it's confirmed it's correct. I have been communicating with him through emails for the last few days and it's only today that it's no longer working.

Please help... I copied the error email I received from Zoho.com. Thanks so much for your assistance.

------------------------------------------------

From: mailer-daemon@mail.zoho.com [mailto:mailer-daemon@mail.zoho.com]
Sent: Wednesday, 17 December 2014 10:29 AM
To: myemail@address.com <replaced>
Subject: Undelivered Mail Returned to Sender

 

This message was created automatically by mail delivery software.

 A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.

 

<receipient email address> Invalid Address, ERROR_CODE :550, ERROR_CODE :74.201.84.155 listed at http://dnsbl.sorbs.net

 

 

 Received:from mail.zoho.com by mx.zohomail.com

                with SMTP id 1418786916630146.5504789735263; Tue, 16 Dec 2014 19:28:36 -0800 (PST)  Message-ID:<14a564a48e8.cacb6c3c166577.8327257923579231441@big-indo.co.id>

 Date:Wed, 17 Dec 2014 10:28:36 +0700

 From:My Name <myemail@address.com>  User-Agent:Zoho Mail  To:<receipient@emailaddress.com>

 Subject:Fwd:  RE: Support Content-Type:multipart/alternative;

                boundary="----=_Part_220450_1883918223.1418786916583"